Marcus Longmuir
Head Of R&D at MSquared
London, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolMarcus Longmuir is a pragmatic engineering leader with 12 years of experience building distributed systems and developer tooling, now heading R&D at MSquared in London. He progressed through technical and leadership roles at Improbable—culminating as Principal Engineer—where he focused on incubation projects and full-stack systems engineering. Marcus contributes to notable open-source projects around gRPC-Web and TypeScript Protocol Buffers tooling, having implemented service generation and resolved tricky proto2 edge cases. He blends hands-on implementation with product-minded incubation, shipping libraries and examples that bridge Go and TypeScript runtimes. Trained in Computer Science at King's College London, he brings entrepreneurial instinct from time at Entrepreneur First and a history of shaping architecture in high-growth teams.
12 years of coding experience
11 years of employment as a software developer
Christleton High SchoolBSc Computer Science, BSc Computer Science at King's College London
Github Skills (15)
typescript10
javascript10
typescripts10
typescript-types10
grpc10
protocol-buffers10
golang9
go9
grpc-web9
browser8
protoc8
plugin8
build-automation7
cicd7
testing7
Programming languages (7)
Github contributions (5)
improbable-eng/ts-protoc-gen
Mar 2017 - Apr 2021
Protocol Buffers Compiler (protoc) plugin for TypeScript and gRPC-Web.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:3 releases, 10 reviews, 43 commits in 4 years 2 months
Contributions summary:Marcus primarily contributed to the TypeScript code generation for Protocol Buffers, including implementing service definition generation. They added and modified code related to TypeScript and JavaScript service definitions, and updated build configurations with Travis. They also fixed issues related to messages and enums without packages and resolved issues with optional and repeated fields in proto2 messages.
protocol-buffersprotobufgrpcprotoc-plugingrpc-web
improbable-eng/grpc-web
Feb 2017 - Nov 2021
gRPC Web implementation for Golang and TypeScript
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:8 releases, 12 reviews, 302 commits in 4 years 9 months
Contributions summary:Marcus contributed to the gRPC Web implementation, focusing on both the frontend and backend aspects of the project. Their work included fixing examples, modifying code for port usage, and adding a TypeScript library for the project. They also merged branches and addressed naming, logging, and testing issues, demonstrating involvement in various areas of the project's codebase.
golangbrowsergrpcgrpc-webtypescript
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